OK here goes. My father used to sing this to me 50 years ago in the East End of London:

In Chinatown there lived a funny man
His name was chicker aka roo chi chan
His legs were long and his body was short
And this is how the Chinese talk

Chicker aka roo chi I chuck alorum
lorum lorum paddy addy whack
oko oko pat him on the boko
attaboy attaboy see him run.